Envelope opener



FIG. 1 is a front elevational view of an envelope opener showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a rear elevational view thereof.

The undisclosed bottom view is plane and unornamented. 

The ornamental design for envelope opener, as shown and described. 